HR 3131 is a white main-sequence star in the constellation Puppis. At 240 light years away, it shines at an apparent visual magnitude of 4.61. It is moving through the Galaxy at a speed of 18.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 23,100 and 39,000 light years from the center of the Galaxy. It will come closest to the Sun 2.8 million years from now when it will brighten to magnitude 3.80 from a distance of 166 light years.